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<div class="title">labelanalysis.hpp</div>  </div>
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<a href="labelanalysis_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor">#include &lt;algorithm&gt;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor">#include &lt;errno.h&gt;</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">#include &lt;assert.h&gt;</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="logger_8hpp.html">logger/logger.hpp</a>&quot;</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor">#include &quot;util/merge.hpp&quot;</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="ioutil_8hpp.html">util/ioutil.hpp</a>&quot;</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="preprocessor">#include &quot;util/qsort.hpp&quot;</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="chifilenames_8hpp.html">api/chifilenames.hpp</a>&quot;</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="preprocessor">#ifndef DEF_GRAPHCHI_LABELANALYSIS</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define DEF_GRAPHCHI_LABELANALYSIS</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="keyword">using namespace </span>graphchi;</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> LabelType&gt;</div>
<div class="line"><a name="l00050"></a><span class="lineno"><a class="code" href="structlabelcount__tt.html">   50</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structlabelcount__tt.html">labelcount_tt</a> {</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    LabelType label;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> count;  <span class="comment">// Count excludes the vertex which has its own id as the label. (Important optimization)</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <a class="code" href="structlabelcount__tt.html">labelcount_tt</a>(LabelType l, <span class="keywordtype">int</span> c) : label(l), count(c) {}</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    <a class="code" href="structlabelcount__tt.html">labelcount_tt</a>() {}</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;};</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> LabelType&gt;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="keywordtype">bool</span> label_count_greater(<span class="keyword">const</span> <a class="code" href="structlabelcount__tt.html">labelcount_tt&lt;LabelType&gt;</a> &amp;a, <span class="keyword">const</span> <a class="code" href="structlabelcount__tt.html">labelcount_tt&lt;LabelType&gt;</a> &amp;b) {</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    <span class="keywordflow">return</span> a.count &gt; b.count;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;}</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> LabelType&gt;</div>
<div class="line"><a name="l00063"></a><span class="lineno"><a class="code" href="labelanalysis_8hpp.html#a7d946005d286e451555dcc32a6b1f862">   63</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="labelanalysis_8hpp.html#a7d946005d286e451555dcc32a6b1f862">analyze_labels</a>(std::string base_filename, <span class="keywordtype">int</span> printtop = 20) {    </div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    <span class="keyword">typedef</span> <a class="code" href="structlabelcount__tt.html">labelcount_tt&lt;LabelType&gt;</a> labelcount_t;</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    std::string filename = filename_vertex_data&lt;LabelType&gt;(base_filename);</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    <span class="keywordtype">int</span> f = open(filename.c_str(), O_RDONLY);</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    </div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    <span class="keywordflow">if</span> (f &lt; 0) {</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;        logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not open file: &quot;</span> &lt;&lt; filename &lt;&lt; </div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;        <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;        <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    }</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <span class="keywordtype">size_t</span> sz = lseek(f, 0, SEEK_END);</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    </div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    <span class="comment">/* Setup buffer sizes */</span>    </div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    <span class="keywordtype">size_t</span> bufsize = 1024 * 1024; <span class="comment">// Read one megabyte a time</span></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    <span class="keywordtype">int</span> nbuf = bufsize / <span class="keyword">sizeof</span>(LabelType);</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    </div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    std::vector&lt;labelcount_t&gt; curlabels;</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    <span class="keywordtype">size_t</span> nread = 0;</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    <span class="keywordtype">bool</span> first = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;    vid_t curvid = 0;</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    LabelType * buffer = (LabelType*) calloc(nbuf, <span class="keyword">sizeof</span>(LabelType));</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    </div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    <span class="keywordflow">while</span> (nread &lt; sz) {</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;        <span class="keywordtype">size_t</span> len = std::min(sz - nread, bufsize);</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;        preada(f, buffer, len, nread); </div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        nread += len;</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;        </div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;        <span class="keywordtype">int</span> nt = len / <span class="keyword">sizeof</span>(LabelType);</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;        </div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;        <span class="comment">/* Mark vertices with its own label with 0xffffffff so they will be ignored */</span></div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;        <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i &lt; nt; i++) { </div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;            LabelType l = buffer[i];</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;            <span class="keywordflow">if</span> (l == curvid) buffer[i] = 0xffffffff;</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;            curvid++;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        }</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;        </div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;        <span class="comment">/* First sort the buffer */</span></div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;        quickSort(buffer, nt, std::less&lt;LabelType&gt;());</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;        </div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;        <span class="comment">/* Then collect */</span></div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;        std::vector&lt;labelcount_t&gt; newlabels;</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;        newlabels.reserve(nt);</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;        vid_t lastlabel = 0xffffffff;</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;        <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i &lt; nt; i++) {</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;            <span class="keywordflow">if</span> (buffer[i] != 0xffffffff) {</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;                <span class="keywordflow">if</span> (buffer[i] != lastlabel) {</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;                    newlabels.push_back(labelcount_t(buffer[i], 1));</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;                } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;                    newlabels[newlabels.size() - 1].count ++;</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;                }</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;                lastlabel = buffer[i];</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;            }</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;            </div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;            <span class="comment">/* Check sorted (sanity check) */</span></div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;            <span class="comment">//  for(int i=1; i &lt; newlabels.size(); i++) {</span></div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;            <span class="comment">//      assert(newlabels[i].label &gt; newlabels[i-1].label);</span></div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;            <span class="comment">//  }</span></div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;        }</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;        </div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;        <span class="keywordflow">if</span> (first) {</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i &lt; (int)newlabels.size(); i++) {</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;                curlabels.push_back(newlabels[i]);</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;            }</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;            </div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;            <span class="comment">/* Check sorted (sanity check) */</span></div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;            <span class="comment">//for(int i=1; i &lt; curlabels.size(); i++) {</span></div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;            <span class="comment">//    assert(curlabels[i].label &gt; curlabels[i-1].label);</span></div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;            <span class="comment">//}</span></div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;            <span class="comment">/* Merge current and new label counts */</span></div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;            <span class="keywordtype">int</span> cl = 0;</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;            <span class="keywordtype">int</span> nl = 0;</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;            std::vector&lt; labelcount_t &gt; merged;</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;            merged.reserve(curlabels.size() + newlabels.size());</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;            <span class="keywordflow">while</span>(cl &lt; (<span class="keywordtype">int</span>)curlabels.size() &amp;&amp; nl &lt; (int)newlabels.size()) {</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;                <span class="keywordflow">if</span> (newlabels[nl].label == curlabels[cl].label) {</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;                    merged.push_back(labelcount_t(newlabels[nl].label, newlabels[nl].count + curlabels[cl].count));</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;                    nl++; cl++;</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;                } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;                    <span class="keywordflow">if</span> (newlabels[nl].label &lt; curlabels[cl].label) {</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;                        merged.push_back(newlabels[nl]);</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;                        nl++;</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;                    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;                        merged.push_back(curlabels[cl]);</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;                        cl++;</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;                    }</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;                }</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;            }</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;            <span class="keywordflow">while</span>(cl &lt; (<span class="keywordtype">int</span>)curlabels.size()) merged.push_back(curlabels[cl++]);</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;            <span class="keywordflow">while</span>(nl &lt; (<span class="keywordtype">int</span>)newlabels.size()) merged.push_back(newlabels[nl++]);</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;            </div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;            curlabels = merged;</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;            </div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;            <span class="comment">/* Check sorted (sanity check) */</span></div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;            <span class="comment">// for(int i=1; i &lt; curlabels.size(); i++) {</span></div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;            <span class="comment">//     assert(curlabels[i].label &gt; curlabels[i-1].label);</span></div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;            <span class="comment">// }</span></div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;        }</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;        </div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;        first = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;    }</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    </div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    <span class="comment">/* Sort */</span></div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    std::sort(curlabels.begin(), curlabels.end(), label_count_greater&lt;LabelType&gt;);</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    </div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;    <span class="comment">/* Write output file */</span></div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;    std::string outname = base_filename + <span class="stringliteral">&quot;_components.txt&quot;</span>;</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    FILE * resf = fopen(outname.c_str(), <span class="stringliteral">&quot;w&quot;</span>);</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;    <span class="keywordflow">if</span> (resf == NULL) {</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;        logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not write label outputfile : &quot;</span> &lt;&lt; outname &lt;&lt; std::endl;</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;        <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;    }</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i &lt; (int) curlabels.size(); i++) {</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;        fprintf(resf, <span class="stringliteral">&quot;%u,%u\n&quot;</span>, curlabels[i].label, curlabels[i].count + 1);</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    }</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;    fclose(resf);</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;    </div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    std::cout &lt;&lt; <span class="stringliteral">&quot;Total number of different labels (components/communities): &quot;</span> &lt;&lt; curlabels.size() &lt;&lt; std::endl;</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;    std::cout &lt;&lt; <span class="stringliteral">&quot;List of labels was written to file: &quot;</span> &lt;&lt; outname &lt;&lt; std::endl;</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;    </div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i &lt; (int)std::min((<span class="keywordtype">size_t</span>)printtop, curlabels.size()); i++) {</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;        std::cout &lt;&lt; (i+1) &lt;&lt; <span class="stringliteral">&quot;. label: &quot;</span> &lt;&lt; curlabels[i].label &lt;&lt; <span class="stringliteral">&quot;, size: &quot;</span> &lt;&lt; curlabels[i].count &lt;&lt; std::endl;</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;    }</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;}</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;</div>
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